@charset "UTF-8";
* {
    margin: 0;
    padding: 0;
    overflow: hidden;
    user-select: none;
}

body {
    background-color: #eee;
}

main div {
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 5px 5px 10px #aaa, -5px -5px 10px #fff;
    background: transparent;
}

main div:active {
    box-shadow: 5px 5px 10px #aaa inset, -5px -5px 10px #fff inset;
}

main {
    display: grid;
    justify-content: center;
    align-content: center;
    grid-template-columns: 100px 100px 100px 100px 100px 100px 100px;
    grid-template-rows: 100px 100px 100px;
    gap: 20px;
    width: 100vw;
    height: 90vh;
}

header,
footer {
    width: 100vw;
    height: 5vh;
    text-align: center;
}

input {
    height: 100%;
    width: 100%;
    text-align: center;
    border: none;
    outline: none;
    font-size: 20px;
    background: none;
}

select {
    height: 100%;
    width: 100px;
    box-shadow: 4px 4px 5px #aaa inset, -4px -4px 5px #fff inset;
    background-color: #eee;
    outline: none;
    border: none;
    text-align: center;
    border-radius: 6px;
}

option {
    box-shadow: 4px 4px 5px #aaa inset, -4px -4px 5px #fff inset;
}